Try having images under src/ for relative path

src/components/Calculator.tsx

@@ -90,10 +90,11 @@ export class Calculator extends React.PureComponent<Props> {
           Points: {availablePoints}
         </div>
 
-        <div>
-          <a href="/shaman/-5505000055523051-55">Shaman test</a>
-          <a href="/shaman/-5595000055523051-55">Shaman test broken</a>
-        </div>
+        <ul>
+          <li><a href="/shaman/-5505000055523051-55">Shaman test</a></li>
+          <li><a href="/shaman/-5595000055523051-55">Shaman test broken</a></li>
+          <li><a href="/rogue/-005055-50205302332212051">Rogue can unlearn first row</a></li>
+        </ul>
       </div>
     )
   }

src/components/Icon.scss

@@ -34,7 +34,7 @@
 
   &--golden {
     .icon__frame {
-      background-image: url('/images/icons/large/gold.png');
+      background-image: url('../images/icons/large/gold.png');
     }
   }
 
@@ -50,7 +50,7 @@
     height: 44px;
     top: -2px;
     left: -2px;
-    background-image: url('/images/icons/large/default.png');
+    background-image: url('../images/icons/large/default.png');
     background-repeat: no-repeat;
     background-size: contain;
   }

src/components/TalentSlot.scss

@@ -58,7 +58,7 @@
     height: 46px;
     bottom: -1px;
     left: -4px;
-    background-image: url('/images/icons/large/default.png');
+    background-image: url('../images/icons/large/default.png');
     background-size: cover;
 
     &:after {

src/components/TalentTree.tsx

@@ -25,7 +25,7 @@ export const TalentTree: React.FC<Props> = ({ specId, knownTalents, availablePoi
   )
 
   const bodyStyle = { 
-    backgroundImage: `url(/images/specs/${specId}.jpg)`
+    backgroundImage: `url(${require(`../images/specs/${specId}.jpg`)})`
   }
 
   const arrows = talents